As a result of my troubles posted in a previous thread, I now have the
stock Radio/Tape Deck/Cd Player out of the '94 4-runner and want to
bench test it. Are the power and ground wires part of the harness
that plugs into the unit? There's another plug hole next to the
antenna hole. I found a thick black wire that I think plugged into
that hole, but the previous owners have made a mess of the wiring.
What is that black wire that runs parallel to the antenna wire.
There's also some kind of wire and plug in the rear luggage
compartment coming out of the storage box on the driver's side, was
that OEM? What might it be?
On Wed, 5 Mar 2008 03:41:05 -0800 (PST), Windsurfer
Normally, yes - go get the "theft kit" connectors at any good
electronics or stereo shop, it should plug right into the back of the
That will have memory power, operating power, ground, dash
illumination, and speaker connections.
Some radios have auxiliary output leads for Power Antenna Auto-up
(on only when set to Radio) and external amplifier on lead (on
whenever the radio or CD or tape or AUX is playing). These are pilot
duty, put a relay on them if they will sink more than a half ampere.
Might be the Auto Up lead going to the power antenna.
Some cars had an optional CD Changer in the trunk. Sometimes they put
the wiring in all the wiring harnesses in all cars even if the option
isn't installed at the factory, just to make it easier to put it in at
It's much cheaper in the long run to make one 'universal' body
harness that covers all available options than having dozens of
slightly different body wiring harnesses for various combinations of
options, and having to track which one goes in each car on the
And then the workers are handed one of a dozen or more different
harnesses to install as each car comes down the line, which will
thoroughly mess up any rhythm and speed they might build up.
--<< Bruce >>--
As Bruce mentioned, the power, ground, illumination, antenna control, and
speaker wires are all part of the harness that plugs into the unit. There
will be 2 power feeds - 1 that is live with the ignition/accessory switch,
and 1 that is live all the time to retain the radio station presets and
theft deterrent function.
Look in the right rear window or rear window for thin wires embedded that
look like defroster wires. If you find an extra set of wires embedded in
the window, the vehicle came with a diversity antenna system. Basically,
with a diversity antenna system, there are 2 antennas - the mast antenna in
front and another antenna embedded in a window somewhere. The radio
monitors the quality of the signals from the antenna and chooses the antenna
with the best signal. The hole that looks like an antenna hole may be the
second antenna feed.
If the wire and plug coming out of the storage box in the back looks like
this: http://www.rverscorner.com/wiring/4pole.html then it is for trailer
If the wire connector has a lot more wires, then it is probably for a CD
On Mar 6, 1:12 am, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:
Thanks fellas for the quick responses. I found that the sound unit
works as the wiring plug was just loose. Consequently, it has been
put back to working order. However, as to
that hole, but the previous owners have made a mess of the wiring.
What is that black wire that runs parallel to the antenna wire.<<
hole that looks like an antenna hole must be the second antenna
feed.<< I found the male plug that fits the hole. However, this is a
narrow coaxial cable. The former owners had taped it over,
connecting it to one of the discarded harnesses I found stuffed behind
the unit. The insulation had been worn to copper wire. I cut the
cable before actually determining what it was when I pulled the
useless harnesses out. The guy who sold me the vehicle told me that
the diversity antenna was a defrost wire. Is there any way I can
splice it back together with the plug wire and connect it to the
radio? Will this help my reception enough to make it worth while? It
works now as well as any radio. The antenna isn't an automatically
detractable one, either. The former owners told me that th
On Fri, 07 Mar 2008 02:38:04 -0800, Windsurfer wrote:
You kinda ran outta steam there! ;)
You can splice the wire back together by trying to find a plug that
matches the one you cut off. They are crimped on at the outer case, and
the center wire is soldered. You may be able to remove the plug from the
wire that was snipped and reattach it. Alternately, you may be able to get
a new wire (complete) from the dealer; they attach in a similar fashio as
the rear window defroster leads.
I have had two cars with Diversity antennas, a 240SX and my Supra. The
Supra had the OEM radio but I yanked it, and the 240SX had a different
radio in it. Don't know if it works or not!
At any rate, try Radio Shack (although they are getting out of 'hobbyist'
supplies and more towards consumer electronics) or find a first-rate
stereo shop. They may be able to help you out.
Good luck! Let us know if the reception increases!
The person who sold you the vehicle obviously know little about audio
installations, or they would not have butchered the factory harness and they
would have known the difference between an antenna and a defroster wire in a
Take the antenna connector that you snipped off and follow Hachi's advice by
taking it to Radio Shack or an electronics supply store.
The reception may improve, but if you have a strong, clean signal most of
the time, you probably won't notice the absence of one of the antennas.
On Mar 8, 2:31 am, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:
Well, I was one step ahead of you, Ray O. I went to Radio Shack, but
they couldn't help me with the mini-coaxial splice. I did find some
information on the net, but I'm not so sure it's what I want. Futher
research might yield a solution, but right now I have too much else to
do. The reception for the radio satisfies me. I closed up the panels
under the dash so it will be a hassle setting it all straight with the
divesity antenna. There's a great electronics store in Needham
outside of Boston. If it is still there, I might drop by sometime
and see what they can do. For now, though, I've called it quits with
this. I'm pretty sure the connection in the back is for a disc
changer. I might someday install one as I can't seem to get the
player that was part of the sound unit to work.
On Sat, 08 Mar 2008 06:00:08 -0800, Windsurfer wrote:
Well, now, this could get interesting!
I'm in the Greenfield area; we have NOTHING!
There used to be a really great store in Springfield, but they're long
gone. There aren't really any good electronics places out here. There is
one in the Springfield area, one of the national chains, and because of
the lack of supply houses in the area they will send you onesie-twosies,
but it's a pain to get to from here.
To wrap it up here, let me inform you that I went into a Nantucket
Sound store in Hyannis and talked to an experienced employee. He said
that he's installed a thousand aftermarket sound systems in Toyotas if
he has installed one. None of them are equiped to take the second
diversity antenna. No one came back and complained about the
On Thu, 13 Mar 2008 04:08:05 -0700, Windsurfer wrote:
Nah. I had a couple cars with Diversity and replaced them with JVC MP3/CD
players and never had a problem.
Supposedly it helps with multipath rejection, but my BIL had a Nissan with
it and I never noticed a difference...
On Wed, 05 Mar 2008 03:41:05 -0800, Windsurfer wrote:
Go to Scosche's web site and get a Toyota OEM plug. It's color coded with
industry standard colors (red for +12 IGN, Yellow for +12 BATT, etc) and
plugs into the Toyota radio. Easiest way to do it.
If you Google, you can probably find a pinout somewhere, or go to your
Toyota garage and ask the Service Manager. If he's a decent guy he'll
print out the wiring diagram for you...
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